20 Sudoku Strong Weak Links

Welcome to this Sudoku Video Turorial on Sudoku Chains and in particular on Sudoku Strong and Weak links. It is part of a series of Sudoku Tutorials that I am basing closely on the Sudoku Analyses Techniques which can be found on the LittleGogs website Analyses Section
http://www.littlegogs.com/analyses/nlanalyses.shtml

Sudoku Links can be used to form chains. The links can be either Strong or Weak. A weak link can always be substituted by a strong link but a strong link cannot be substituted by a weak link.

If a House, Column, Row or cell has only two possibles, then the link between those two possibles is Strong.
If there are more than 2 possibles, then the link will be Weak.

Logically if you can say
If the value of the Possible is NOT valid and the value of the possible at the other end of the chain becomes Valid automatically - then you have a Strong Link.

I use Duncans Sudoku Solver extensively and here is a link to download it
http://www.littlegogs.com/download/nldownload.shtml
Cracking The Cryptic Website – I’m using as a source of Soduku Examples
https://www.youtube.com/c/CrackingTheCryptic
Im also using SudokuOfTheDay as a source of some examples in some tutorials
https://www.sudokuoftheday.com/dailypuzzles/

Видео 20 Sudoku Strong Weak Links канала Sudoku Channel